CVE-2026-23298In the Linux kernel, the following vulnerability has been resolved: can: ucan: Fix infinite loop from zero-length messages If a broken ucan device gets a message with the message length field set to…
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In the Linux kernel, the following vulnerability has been resolved: can: ucan: Fix infinite loop from zero-length messages If a broken ucan device gets a message with the message length field set to 0, then the driver will loop for forever in ucan_read_bulk_callback(), hanging the system. If the length is 0, just skip the message and go on to the next one. This has been fixed in the kvaser_usb driver in the past in commit 0c73772cd2b8 ("can: kvaser_usb: leaf: Fix potential infinite loop in command parsers"), so there must be some broken devices out there like this somewhere.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-835
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 4.19 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17; from 6.19 before 6.19.7; 7.0; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/13b646eec3ba1131180803f5aaf1fee23540ad8fpatch
- https://git.kernel.org/stable/c/1e446fd0582ad8be9f6dafb115fc2e7245f9bea7patch
- https://git.kernel.org/stable/c/aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588patch
- https://git.kernel.org/stable/c/ab6f075492d37368b4c7b0df7f7fdc2b666887fcpatch
- https://git.kernel.org/stable/c/bd85f21a6219aeae4389d700c54f1799f4b814e0patch
- https://git.kernel.org/stable/c/c7bc62be6c1a60bb21301692009590b1ffda91d9patch
- https://git.kernel.org/stable/c/ca07d3c6eef14d34e6fdeefe55058db045be29dcpatch
- https://git.kernel.org/stable/c/e7bb6e0606b5f233531aaaad9542d69fbb792115patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.